CZ2000380A3 - Moistening wipes having a substrate with a discontinuous pattern of a high internal phase inverse emulsion disposed thereon and process of making thereof - Google Patents

Abstract

The moisturizing wipe comprises an inverse emulsion arranged on the basis of an intermittent pattern providing surfaces "Covered with emulsion and areas without emulsion, wherein in use, applying pressure to the moisturizing wipe, emulsion locally on the other hand, it displaces the water used for cleaning ». the napkin areas remain dry.

Description

Technical field

The invention relates to cleaning products, in particular moisturizing wipes, having an inverse emulsion having a high internal phase disposed thereon.

BACKGROUND OF THE INVENTION

Substrates with skin care compositions (or lotions) and other coatings are well known in the art. Skin care compositions are often associated with backing layers to soften them and can also be used to soothe the skin, such as a facial or cosmetic handkerchief. Examples of skin lotions are found in U.S. Patent No. 4,442,618, issued January 17, 1984 to Coleman et al., And U.S. Patent No. 4,481,243, issued November 6, 1984, to Allen, the contents of which are incorporated herein by reference. incorporated here by reference.

However, these attempts in the art do not solve the problem of how to use a skin care composition to improve skin cleansing with this handkerchief. Neither do these attempts indicate, either. · How to clean other surfaces using a substrate treated with some skin care product.

Products such as moisturizing wipes have been developed. Certain wipes have a considerable advantage over prior art cleaning products to remove soiling, particularly from the perianal area. Such wipes include a substrate (eg, a nonwoven or tissue) treated with a water-in-lipid emulsion. These wipes are particularly advantageous for cleaning, especially when provided in the form of a wet cleaning wipe to remove stains in the perianal area. Examples of such wipes and their manufacture are found in commonly-assigned World Patent Applications, WO 96/14835, published May 23, 1966, by Mackey et al .; and No. WO 96/21505, published July 18, 1996, on behalf of DesMaraise, the disclosures of which are incorporated herein by reference. These wipes release considerable amounts of water during use for convenient, more efficient cleaning.

The lipid phase of the emulsion contained in these wipes is sufficiently brittle to be easily broken by small shear contact or compression (for example during skin wiping) to easily release the internal water phase, but strong enough at elevated temperatures when the lipid is melted to Avoid premature release of the water phase during shaking during processing. The continuous lipid phase of these products is also sufficiently stable during storage to avoid significant evaporation of the internal water phase. The normal tensile strength and flushability properties of these products are not adversely affected when treated with the inverse emulsions of the present invention with a high internal phase. As a result, users of these products get a comfortable, efficient and wet cleaning without having to change their normal cleaning

4 4 4 ··· ··· · ···

44 · 4 · 4 · 44 · 4 · 4

4 · · · · · · · · ·

4444 4 4 4 · · 4 · ·· Customs. This technique is conveniently useful for other purposes such as cleaning hard surfaces, etc.

The cleaning process becomes easier when the emulsion is directly exposed to the surface to be cleaned. Such a napkin may comprise a substrate having one or two exposed, outwardly facing surfaces, and an emulsion disposed on one of these exposed surfaces. However, such an embodiment provides the drawbacks of creating a sticky feeling to the user, potential loss of surface emulsion and processing difficulties. In a preferred embodiment, the emulsion is arranged between two layers of the substrate and a laminate is formed.

Unexpectedly, it has been found that the uninterrupted coating of the emulsion on the backing layer does not provide the most effective cleansing, especially when it is desirable to clean human skin. The discontinuous (discontinuous) pattern of the emulsion on the substrate provides a cleaning mechanism not found in the prior art. As used herein, the term "emulsion pattern" means a pattern having emulsion-free regions between the regions of the substrate on which the emulsion is arranged.

During cleaning, water is released from the emulsion to remove dirt from the skin. The skin area moistened with water and from which dirt is removed is then wiped dry with areas of the substrate without emulsion. A similar benefit occurs when the napkin is used to clean other surfaces such as window glass, counter tops, sinks, porcelain and metal parts, walls, and the like, and other surfaces such as carpets or furniture.

The mechanism for transferring water from the emulsion to the surface to be cleaned comprises several steps. First, the water is released from the emulsion due to the pressure exerted by the user. This pressure breaks (breaks down) the emulsion and releases water. Water then saturates the substrate. After saturation, water penetrates the substrate in the Z direction.

· · 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

99 9 9 9 9 9 9 9 9 9

Excess water, which is water in addition to the local absorbent capacity of the substrate, is then transferred from the napkin to the surface.

One potential approach to the problem of providing sufficient amounts of water to saturate the substrate and transfer it to a given surface is to provide an uninterrupted (continuous) layer of emulsion on the substrate. The continuous emulsion layer may contain more water than the intermittent emulsion layer. This potential approach has several shortcomings. First, the thin continuous layer of the emulsion must not exceed the local capacity of the substrate. Second, the excess lipid phase in the emulsion causes deposition and may not be well received by the user and may contribute to manufacturing difficulties. Third, when the amount of emulsion becomes too large, breaking the emulsion and releasing water therefrom can be difficult. Such difficulty is due to the increased amount of lipid phase present. As the amount of lipid phase increases, the emulsion itself changes rather than breaks. Fourth, the surface area to volume ratio is far from the optimum. Finally, the cost of this napkin increases directly with the amount of emulsion provided.

Accordingly, it is an object of the present invention to provide a humectant wipe comprising a substrate and a high internal phase inverse emulsion. It is a further object of the present invention to provide a napkin having an intermittent coating of emulsion on its substrate. Finally, it is an object of the present invention to provide a wipe having this emulsion arranged in a pattern that provides improved transfer of water released from the emulsion to the surface desired for cleaning, although at the same time the loss of water from the emulsion due to evaporation is minimized.

• · · · · · · · · ·

SUMMARY OF THE INVENTION

The invention includes a moisturizing wipe. The napkin comprises a substrate and a high internal phase inverse emulsion disposed thereon. The emulsion is arranged in a discontinuous (or discontinuous) pattern such that the substrate has first areas covered with emulsion and second areas without emulsion.

In a preferred embodiment, the substrate comprises areas of high and areas of low basis weight. The emulsion is placed side by side with low basis weight regions.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 is a plan view of a napkin according to the present invention showing the positions of two tufts in the longitudinal direction (production lines).

Giant. 2 is a plan view of an alternative embodiment of the present invention comprising emulsion macro-designs defining decorative features.

Giant. 3 is a plan view of an alternative embodiment of the present invention showing a pattern in which the strips are defined by individual spherical surfaces of the emulsion.

DETAILED DESCRIPTION OF THE INVENTION

The moisturizing wipe described herein can be used for multiple purposes. For example, the moisturizer may be used as a make-up or cosmetic tissue, toilet paper, paper towel, baby napkin, handkerchief. · Adult, hard surface cleaner and the like. · · · · · Dospělé · dospělé · dospělé · dospělé · dospělé dospělé dospělé The intended use of the composition does not limit the end product.

The backing layer granted 12 granted 4.

Referring to FIG. 1, the wetting wipe 8 comprises a substrate 10 and an emulsion 12 disposed thereon. The substrate may be cellulose-based, in particular tissue paper, nonwoven, foam, or any combination thereof. Suitable cellulose-based substrates 10 are described in U.S. Patent No. 5,245,025, issued September 14, 1993 to Trokhan et al .; C.

715, issued April 2, 1996 to Trokhan

326, issued July 9, 1996 to Trokhan et al .; C.

859, issued January 20, 1987 to Trokhan; No. 4,514,345, issued April 30, 1985 to Johnson et al., issued July 16, 1985 to Trokhan; C.

July 1994 for Rasch et al. March 1989 for Trokhan; C.

granted November 17, 1981 to Carstens; No. 4,513,051, issued April 23, 1985 to Lavash; No. 4,637,859, issued January 20, 1987 to Trokhan; No. 5,143,776, issued September 1, 1992 to Givense; No. 5,637,194, issued June 10, 1997 to Ampulski et al .; No. 5,609,725, issued March 11, 1997 to Phan; and No. 5,628,876, issued May 13, 1997 to Ayers et al .; the disclosures of these patents are incorporated herein by reference.

A suitable napkin substrate 10 has a basis weight of about 7 to 25 pounds (about 3,175 to 11,339 kg) per 3,000 square feet (279 m ² ) per layer, preferably about 8 to 10 pounds (about 3,628 to 4,535 kg) per 3,000 square feet (279 m ² ) per layer, and most preferably about 8 1/2 lbs (about 3, 855 kg) per 3,000 square feet (279 m ² ) per layer for toilet applications

al. ; No 5 503 al. ; No 5 534 : al .; No. 4 637 No. 4 514 345, No. 4 529 480, 5 328 565, ¹ No 4 191 609, , 4 300 981, No. 4 513 051, '859, granted

• · and · papers; and about 18 to 22 pounds (about 8,164 to 9.979 kg) per 3,000 square feet (27,9 m ² ) per layer for hard surface cleaning applications. For this claimed invention, a multi-basis weight substrate 10 is feasible. The multi-basis weight substrate 10 has high and low basis weight regions located adjacent to each other and, optionally, intermediate regions of different basis weight. Areas with a high basis weight provide strength. Areas of low basis weight ensure the transfer of water released from the emulsion to a surface. In the extreme case, the low basis weight regions may be openings to increase water transfer to the surface. If a multi-basis weight substrate 10 is used, the averaging of both the high-basis weight and low-basis weight areas, or the high, intermediate, and low basis weight areas is taken into account.

If a multi-basis weight substrate 10 is desired, such substrate 10 may be manufactured according to commonly assigned U.S. Patent Nos. 5,277,761, issued January 11, 1994 to Phan et al. ; No. 5,443,691, issued August 22, 1995 to Phan et al .; and No. 5,614,061, issued March 25, 1997 to Phan et al .; the disclosures of these patents are incorporated herein by reference. If it is desirable to have a multi-basis weight substrate 10 having radially oriented fibers, such substrate 10 may be manufactured according to commonly assigned U.S. Patent Nos. 5,245,025, issued September 14, 1993 to Trokhan et al .; No. 5,503,715, issued April 2, 1996 to Trokhan et al .; No. 5,527,428, issued June 18, 1996 to Trokhan et al., or No. 5,534,326, issued July 9, 1996, to Trokhan et al .; the disclosures of these patents are incorporated herein by reference.

If someone wishes to use a substrate 10 more durable or nonwoven for the moisturizing wipe 8, such substrate 10 may be made according to the commonly assigned 444444 · 4

4 4 4 4 4 4

443 44 4 4 4 4 4

4444444 4,444 44 4

No. 4,444,444,444,444,444,444 44 US Pat. Nos. 4,097,965, issued July 4, 1978 to

Gotchela et al .; No. 4,130,915, issued December 26, 1978 to Gotchel et al .; No. 4,296,161, issued October 20, 1981 to Kaiser et al., and No. 4,682,942, issued July 28, 1987, to Gotchel et al .; the disclosures of these patents are incorporated herein by reference.

Emulsion

Emulsion 12 comprises: (1) a continuous solidified lipid phase; (2) an emulsifier that forms an emulsion 12 when the lipid phase is liquid; and (3) an inner polar (opposite) phase dispersed in the lipid phase. This emulsion 12 breaks down when subjected to a small shear during use, for example wiping the skin or other surface, and releases the inner opposite phase.

1. External lipid phase

The continuous solidified lipid phase provides a basic stabilizing structure for the high internal phase inverse emulsions 12 of the present invention. In particular, this continuous lipid phase is what keeps the dispersed inner phase from being prematurely released prior to use of the article, for example during storage.

The continuous lipid phase may contain from about 2 to about 60% emulsion 12 of the present invention. Preferably, the continuous lipid phase will contain from about 5 to about 30% emulsion 12. Most preferably, the continuous lipid phase will contain from about 6 to about 15% emulsion 12.

The major component of this continuous lipid phase is a waxy lipid material. This lipid material is characterized by a melting point of about 30 ° C or higher, i.e., at ambient temperatures • · · 000000 0 0 0 0

000 00 0 0000

000 00 0 0000

0000 00 0 000 000 0

0000 0000

0000 0 00 00 00 00 rigid. Preferably, the lipid material has a melting point of about 50 ° C or higher. Typically, the lipid material has a melting point in the range of about 40 ° C to about 80 ° C, more typically in the range of about 50 ° C to about 70 ° C.

Although this waxy lipid material is solid at ambient temperatures, it is also desirable to be liquid or plastic at those temperatures at which the high internal phase inverse emulsion 12 is applied to a carrier. Moreover, although the lipid material is liquid or plastic at those temperatures at which the emulsion 12 is applied to the support substrate 10, it is still desirable to still be somewhat stable (i.e., minimal agglomeration of the emulsion microcapsules) for extended periods of elevated temperature ( e.g. about 50 ° C or higher) that normally occur during storage and dispensing of the products of the invention. This lipid material also needs to be sufficiently brittle under the shear conditions of use of the article, so that it breaks and releases the dispersed inner opposite phase. These lipid materials should also desirably provide a good skin feel when used in personal care products such as wet-like cleansing wipes and wipes used to clean the perianal area.

Suitable wax lipid materials for use in the high internal phase inverse emulsion 12 of the present invention include natural and synthetic waxes as well as other oil-soluble materials having a wax consistency. As used herein, the term waxes refers to organic compositions or compounds that are generally water insoluble and tend to exist at ambient temperature (for example, at about 25 ° C) as amorphous, microcrystalline or crystalline solids. Suitable waxes include various types of hydrocarbons, as well as esters of certain fatty acids and fatty alcohols.

· T t t t t t t t t t t t t t

They may be derived from natural sources (i.e., animal, plant or mineral) or may be synthesized. Mixtures of these various waxes may also be used.

Some exemplary animal and vegetable waxes that may be used in the present invention include beeswax, spermacet, lanolin, shellac carnauba candelilla animal wax, wax, wax and the like. Particularly preferred and vegetable waxes are beeswax, lanolin and candelilla wax. Exemplary mineral waxes that may be used in the present invention include oil-based waxes such as paraffin, petrolatum (natural petrolatum) and microcrystalline wax and fossil or earth waxes such as white ceresine, yellow ceresine, white ozokerite wax and the like. . Particularly preferred mineral waxes are petrolatum, microcrystalline wax, yellow ceresin and white ozokerite wax. Exemplary synthetic waxes that may be used in the present invention include ethylene polymers such as polyethylene wax, chlorinated naphthenates such as Halowax, hydrocarbon type waxes produced by FischerTropsch synthesis, and the like. Particularly preferred synthetic waxes are polyethylene waxes.

In addition to the waxy lipid material, the continuous lipid phase may contain minor amounts of other lipophilic or lipid miscible materials. These other lipophilic or lipid miscible materials are typically included for the purpose of stabilizing the emulsion 12, to minimize the loss of the inner opposite phase, or to improve the aesthetic feel of the emulsion 12 on the skin. Suitable materials of this type that may be present in the continuous lipid phase include heat-melt adhesives such as Findley 193-336 resin, long chain alcohols such as cetyl alcohol, stearyl alcohol and cetaryl alcohol, water-insoluble soaps such as stearate ·· ·· ♦ · Trimeticone miscible aluminum, silicone polymers such as polydimethylsiloxanes, hydrophobically modified silicone polymers such as phenyl similarly. Other suitable lipophilic / lipid materials include polyol polyesters.

By polyol polyester is meant a polyol having at least 4 ester groups. By polyol is meant a polyhydric alcohol containing at least 4, preferably from 4 to 12, and most preferably from 6 to 8, hydroxyl groups. The polyols include monosaccharides, disaccharides and trisaccharides, sugar alcohols and other sugar derivatives (e.g., alkyl glycosides), polyglycerols (e.g., diglycerol and triglycerol, pentaerythritol and polyvinyl alcohols. Preferred polyols include xylose, arabinose, ribose, xylite, methyl, glucose, mannose, glucose, mannose, glucose). galactose, fructose, sorbitol, maltose, lactose, sucrose, raffinose, and maltotriose, a particularly preferred polyol is sucrose. more preferably no more than 2 non-esterified hydroxyl groups Typically, substantially all (for example, at least about 85%) of the hydroxyl groups of a given polyol are esterified, and in the case of sucrose polyesters from about 7 to 8 hydroxyl groups of a given polyol are typically esterified.

By liquid polyol polyester is meant a polyester of the above-described groups having a liquid consistency at or below about 37 ° C. By the term rigid polyol polyester is meant a polyol polyester of the groups described herein having a plastic or rigid consistency at or above about 37 ° C. Liquid polyol polyesters and rigid polyol polyesters can be used successfully as emollients (softeners) and immobilizers (* ·· ·

4 4 4 4

4 4 4 4

444 «·· 4 · 4 4

4444 4 44 • 4 44 • 4 · 4 4

4 4 4

44, respectively, in the emulsions 12 of the present invention. In some cases, rigid polyol polyesters may also provide some softening functionality.

2. Internal reverse phase

Typically, the major component of the high internal phase inverse emulsions 12 of the present invention is the dispersed internal polar (opposite) phase. In preferred embodiments, the reverse phase will comprise a significant percentage of water, preferably at least about 60% by weight of emulsion 12, preferably at least about 75% by weight, and more preferably at least about 90% by weight.

This inner opposite phase can provide a variety of benefits when released. For example, in soaked similar wipes 8 for cleaning the perianal area where the internal phase is water, it is this released water that provides the primary cleaning activity of these compositions.

In a preferred embodiment of the present invention, the inner opposite phase (preferably containing water as the largest component) is a disinfecting phase comprising an antimicrobial compound, preferably an ether oil or an active ingredient thereof, and a bleach, preferably peroxygen. Disinfectant wipes 8 containing such an inner opposite disinfection phase provide effective disinfection performance on the surface while being safe for the treated surface.

By effective disinfection performance, it is meant herein that the disinfectants 8 of the present invention allow a significant reduction in the amount of bacteria on the infected surface. Indeed, effective disinfection from various microorganisms, including Gram positive bacteria such as Staphylococcus aureus, and Gram-negative bacteria such as Pseudomonas aeruginosa, as well as various more resistant microorganisms, can be achieved.

4444 44 4 444 44 4 4444 4 4 4 4

4444 4,444 44,444 44 such as fungi (e.g. Candida albicans) present on infected surfaces.

Another advantage of the disinfectant wipes 8 of the present invention is that, in addition to providing the disinfectant properties, good cleaning is also ensured, since the disinfectant reverse phase may further comprise active surfactants and / or solvents.

A substantial portion of the preferred disinfectant reverse phase is an antimicrobial compound, typically selected from the group consisting of an ethereal oil and its active ingredient, paraben (eg, methylparaben, ethylparaben), glutaraldehyde, and mixtures thereof. For use herein, the preferred antimicrobial compounds are the essential oils or their active ingredients.

Suitable ether oils or their active ingredients for use herein are those that exhibit antimicrobial activity and more particularly antibacterial activity. By ethereal oil active agents is meant here any component of the ether oil which exhibits antimicrobial / antibacterial activity. A further advantage of these etheric oils or their active ingredients is that they impart a pleasant fragrance to the disinfectant wipes 8 of the present invention without the need to provide any perfume. Indeed, the disinfectant wipes 8 of the present invention provide not only excellent disinfection performance on infected surfaces, but also a pleasant scent.

These essential oils include, but are not limited to, those obtained from thyme, east indian grass, citrus, lemons, oranges, anise, cloves, anise seeds, cinnamon, geranium, roses, mint, lavender, lemon essential oil, eucalipte, menthol, camphor, sandalwood, cedar and mixtures thereof. Active oils of essential oils for use here

4 * 4 * 44

• 4 4 • 4444

44

4 4 4 4 4

4 4 4 4 4

4 4 4 4 »44 44 include, but are not limited to, thymol (present in, for example, thyme), eugenol (present in, for example, cinnamon and clove), menthol (present in, for example, mint), geraniol (excessive in geranium and rose, for example) verbenone (present for example in verbena), eucalyptol and pinocarvone (present in eucalyptus), cedrol (present for example in cedar), anethole (present for example in anise), carvacrol, hinokitiol, berberine, limonene, methyl salicylan and mixtures thereof. Preferred ethereal oil active ingredients for use herein are thymol, eugenol, verbenone, eucalyptol, carvacrol, limonene and / or geranioil. Thymol is commercially available from Aldrich, eugenol can be purchased, for example, from Sigma, Systems-Bioindustries (SBI) - Manheimer Inc.

The antimicrobial compound or mixtures thereof will typically be present in the inner opposite phase at a level of from 0.001% to 5%, preferably from 0.001% to 3%, more preferably from 0.005% to 1%, by weight of the total internal opposite phase.

An important part of the internal disinfection opposite phase is some bleaching agent or mixtures thereof. Any bleach known to the person skilled in the art, including any chlorine bleach, as well as any peroxygen bleach, can be used herein. The presence of a bleaching agent, preferably a peroxygen bleaching agent, in the disinfectant wipes 8 of the present invention contributes to their disinfectant properties.

Suitable chlorine bleaching compositions for use herein include any compound capable of releasing chlorine when the compound is in contact with water. Suitable chlorine bleaches include alkali metal dichloroisocyanurates as well as alkali metal hypohalides such as hypochlorite

4 * 4444 »· 44 4444 44 44

44 4444

444 44 4 4445

4444444 4,444 4 · 1 »4 4444 444« »44 4 44 44 44 44 and / or bromate. Preferred chlorine bleaching agents are alkali metal hypochlorites. Various forms of alkali metal hypochlorite are commercially available, for example sodium hypochlorite.

Preferred bleaching agents are peroxygen bleaching agents, especially hydrogen peroxide or a water-soluble source thereof, or mixtures thereof. Hydrogen peroxide is particularly preferred.

Peroxygen bleaching agents such as hydrogen peroxide are preferred herein because they are generally well accepted from the viewpoint of environmental protection. For example, hydrogen peroxide decomposition products are oxygen and water.

As used herein, a hydrogen peroxide source refers to any compound that produces perhydroxyl ions when the compound is in contact with water. Suitable water-soluble sources of hydrogen peroxide for use herein include percarbonates, per silicates, persulphates such as monopersulfate, perborates, peracids such as diperoxy dodecanoic acid (DPDA), magnesium perfalic acid, dialkyl peroxides, diacyl peroxides, matching percarboxylic or organic and inorganic peroxides, organic and inorganic peroxides mixtures thereof.

Typically, the bleaching composition or mixtures thereof is present at a level of from 0.001% to 15% by weight of the total internal reverse phase, preferably from 0.001% to 5%, and more preferably from 0.005% to 2%.

The internal disinfectant reverse phase may further comprise some detersive surfactant or mixtures thereof. Typically, the agent or mixtures thereof is present at a level of from 0.001% to 40% by weight of the total internal reverse phase, preferably from 0.01% to 10%, and more preferably from 0.05% to 2%.

Suitable cleaning surfactants for use in the present invention include any surfactant known to those skilled in the art, such as surfactants such as surfactants. 4

4444444 4,444 44 4 • 4 4444,444 4

4444 4 4β 44 44 94 Non-ionic, anionic, cationic, amphoteric and / or zwitterionic. Preferred cleaning surfactants for use herein are amphoteric and / or zwitterionic agents.

Aqueous amphoteric cleaning surfactants for use herein include amine oxides of the formula R ¹ R ² R ³ NO, wherein each R ¹ , R ² , and R ³ is independently a saturated, substituted or unsubstituted, linear or branched hydrocarbon chain having from 1 to 30 carbon atoms. Preferred amine oxide surfactants for use herein are amine oxides having the formula r ¹ r ² r ³ NO, wherein R ¹ is a hydrocarbon chain having from 1 to 30 carbon atoms, preferably from 6 to 20, more preferably from 8 to 16, most preferably from 8 to 12, and wherein R ² and R ³ are independently substituted or unsubstituted, linear or branched hydrocarbon chains having from 1 to 4 carbon atoms, preferably from 1 to 3 carbon atoms, and more preferably are methyl groups. R ¹ may be a saturated, substituted or unsubstituted, linear or branched hydrocarbon chain. Suitable amine oxides for use herein are for instance natural blend _C8 amine oxides -Cio <amine oxides as well as C ₂ ^- CI6 commercially available from Hoechst. Amine oxides are preferred here because they provide effective cleaning performance and further participate in the disinfection properties of disinfectant wipes 8 here.

Suitable zwitterionic surfactants for use herein include both cationic and anionic hydrophilic groups on the same molecule over a relatively wide pH range. A typical cationic group is a quaternary ammonium group, although other positively charged groups such as phosphonium, imidazolinium and sulfonium groups may also be used. Typical anionic hydrophilic groups are carboxylates and sulfonates, although other groups such as sulfates may be used.

phosphonates and the like. The generic formula for some zwitterionic surfactants for use here is:

R ¹ -N ⁺ (R ² ) (R ³ ) R ⁴ [X ^- ] wherein R ¹ is a hydrophobic group; R ² and R ³ are each a C 1 -C 14 alkyl, hydroxyalkyl or other substituted alkyl group which may also be attached to form ring structures with N; R ⁴ is a moiety linking a cationic nitrogen atom to a hydrophilic group and is typically an alkylene, hydroxyalkylene, or polyalkoxy group containing from 1 to 10 carbon atoms; and X is a hydrophilic group, which is preferably a carboxylate or sulfonate group. Preferred hydrophobic groups ^R1 are alkyl groups containing 1 to 24, preferably less than 18, preferably less than 16 carbon atoms. The hydrophobic group may comprise an unsaturation state and / or substituents and / or linking groups such as aryl groups, amide groups, ester groups and the like. In general, simple alkyl groups are preferred for cost and stability reasons.

Highly preferred zwitterionic surfactants include betaine and sulfobetaine surfactants, derivatives thereof, or mixtures thereof. These betaine and sulfobetaine surfactants are preferred herein because they aid disinfection by increasing the permeability of bacterial cell walls, thus allowing other active ingredients to enter the cell.

In addition, due to the mildly acting profile of betaine and sulfobetaine surfactants, these are particularly suitable for cleaning delicate surfaces, for example hard surfaces in contact with food and / or children. Betaine and sulfobetaine surfactants are also exceptionally mildly acting on the skin and / or treated surfaces.

Suitable betaine and sulfobetaine surfactants for use herein are betaine / sulfobetaine and betaine-like detergents in which the molecule contains both basic and acidic groups which form an inner salt providing the molecule with both cationic and anionic hydrophilic groups over a wide range of values pH. Some common examples of these detergents are described in U.S. Pat. Nos. 2,082,275, 2,702,279 and 2,255,082, incorporated herein by reference. Preferred betaine and sulfobetaine surfactants are according to the following formula:

R ¹ - N ⁺ - (CH _{2) n} [Y ~]

R ¹ wherein R ¹ is a hydrocarbon chain containing from 1 to 24 carbon atoms, preferably from 8 to 18, more preferably from 12 to 14; wherein R ² and R ³ are R ¹ hydrocarbon chains containing from 1 to 3 carbon atoms, preferably 1 carbon atom; wherein n is an integer from 1 to 10, preferably from 1 to 6; more preferably is 1; Y is selected from the group consisting of carboxyl and sulfuryl radicals; and wherein the sum of the hydrocarbon chains R ^1, R ² and R ³ is from 14 to 24 carbon atoms or mixtures thereof.

Examples of particularly suitable betaine active surfactants include C ₁₂ -C ₁₈ alkyldimethyl betaine such as coconut betaine and C ₁₀ -C ₁₆ alkyldimethyl betaine such as lauryl betaine. Coconut betaine is commercially available from: · · · · · · · · · · · bet · · · * * * * * * * · · · · · ·

Seppic under the trade name Amonyl 265 ^R. Laurylbetain is commercially available from Albright & Wilson under the trade name Empigen BB / L ^R.

Other specific zwitterionic surfactants have generic formulas:

R ¹ -C (O) -N (R ² ) - (C (R ³ ) 2) n N (R ² ) 2 ⁽⁺⁾ - (C (R ³ ) ₂ ) _n -SO ₃ ⁽ ·;

or

R ¹ -C (O) -N (R ² ) - (C (R ³ ) 2) n N (R ² ) 2 ⁺ - (C (R ³ ) ₂ ) _n -COO ^(_) ;

wherein each R ¹ is a hydrocarbon, for example an alkyl group containing from 8 to 20, preferably up to 18, more preferably up to 16 carbon atoms; each R ² is either hydrogen (when attached to the amide nitrogen), short chain alkyl or substituted alkyl having from 1 to 4 carbon atoms, preferably a group selected from methyl, ethyl, propyl, hydroxy substituted ethyl or propyl, and mixtures thereof preferably methyl; each R ³ is selected from the group consisting of hydrogen and hydroxy groups, and each n is a number from 1 to 4, preferably from 2 to 3, more preferably 3, with no more than one hydroxy group in each moiety (C (R ³ ) ₂ ). The R ¹ groups may be branched and / or unsaturated. The R ² groups can also be joined to form annular structures. A surfactant of this type is the fatty acylamidopropylene- (hydroxypropylene) sulfobetaine available from Sherex Company under the trade name Varion CAS sulfobetaine ^(R) .

Suitable nonionic surfactants for use herein are fatty alcohol ethoxylates and / or propoxylates, which are commercially available with a variety of fatty alcohol chain lengths and a degree of ethoxylation. Indeed, the HLB values of these alkoxylate nonionic surfactants.

They depend essentially on the chain length of the fatty alcohol in question, the nature of the alkoxylation and the degree of alkoxylation. Surfactant catalogs are available with a list of surfactants, including non-ionic ones, together with their respective HLB values.

Particularly suitable for use herein as nonionic surfactants are hydrophobic nonionic surfactants having an HLB (hydrophilic-lipophilic balance) value below 16 and preferably below 15. These hydrophobic nonionic surfactants have been found to provide good grease cutting properties.

Preferred nonionic surfactants for use herein are nonionic surfactants according to the following formula:

R0- (C ₂ H ₄ O) _{n (C3 H6} O) _m H, wherein R is an alkyl chain Cg-C ₂₂ alkyl benzene chain, or C 6 ^_ ₂ 8z and where n + m is from 0 to 20 and n is from 0 to 15 and m is from 0 to 20, preferably n + m is from 1 to 15 and n is from 0.5 to 15, more preferably n + m is from 1 to 10 and n is from 0 to 10. Preferred R chains for use herein, alkyl chains are C ₈ -C ₂₂ . Accordingly, hydrophobic nonionic surfactants of the brand Dobanol R 912.5 (HLB = 8.1; R is a mixture of alkyl chains of C ₉ and Cu, n is 2.5 and m is 0), or Lutensol R are suitable for use herein. T03 (HLB = 8; R are alkyl chains _of C _13, n is 3 and m is 0), or Lutensol R AO3 (HLB = 8; R is a mixture of alkyl chains of C _i3 and cis, n is 3 and m is 0), or Tergitol 25L3 (HLB = 7.7; R is within the chain length of C ₁₃ to C ₁₅ alkyl chains, n is 3 and m is 0), or Dobanol R 23-3 (HLB = 8.1; R is a mixture of C ₁₂ alkyl chains and _i3 C, n is 3 and m is 0), or Dobanol R 23-2 (HLB = 6.1; R is a mixture of alkyl chains and C _i2 C _i3, n is 2 and m is 0), or Dobanol R 45-7 ( HLB = 11.6; R is a mixture of alkyl chains and C _5, n is 7 and m is 0), or Dobanol R 23-6.5 (HLB = 11.9; R is a mixture of alkyl

Dobanol R 25-7 Cis, n is 7 am chains of C12 and _i3, n is 6.5 and τη is 0), or (HLB = 12; R is a mixture of alkyl chains of C ₁₂ and is 0), or Dobanol R 91 -5 (HLB = 11.6; R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 5 and m is 0), or Dobanol R 91-6 (HLB = 12.5; R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 6 am is 0), Dobanol R 91-8 (HLB = 13.7; R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 8 am is 0), or Dobanol R 91-10 (HLB = 14.2 R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 10 and m is 0), or mixtures thereof. Preferred herein are Dobanol R 91-2.5, or Lutensol R TO3, or Lutensol R AO3, or Tergitol R 25L3, or Dobanol R 23-3, or Dobanol R 23-2, or Dobanol R 2310, or mixtures thereof. Dobanol R surfactants are commercially available from SHELL, Lutensol R surfactants from BASF, and Tergitol surfactants are commercially available from UNION CARBIDE.

Suitable anionic surfactants for use herein include water soluble salts or acids of the formula ROSO 3 M wherein R is preferably a C6-hydrocarbyl C ₂ 4, preferably an alkyl or hydroxyalkyl having an alkyl component _of C ₈ -C ₂₀ alkyl, preferably C ₈ -C ₈ or hydroxyalkyl, and M is H or a cation such as an alkali metal cation (such as sodium, potassium carbonate, lithium), or ammonium or substituted ammonium (such as methyl, dimethyl, and trimethyl ammonium cations and quaternary ammonium cations such as tetramethylammonium , and dimethylpiperidinium and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like).

Other suitable anionic surfactants for use herein include alkyl diphenyl ether sulfonates and alkyl carboxylates. Other anionic surfactants may include salts (including, for example, sodium, potassium carbonate, ammonium, and substituted ammonium salts such as mono-, di-, and triethanolamine salts).

• 4 4 <

4 * 4 soaps, C ₉ -C ₂₀ linear alkylbenzene sulphonates, C ₈ -C ₂₂ primary or secondary alkanesulphonates, C ₈ -C ₂ olefinsulphonates, sulphonated polycarboxylic acids prepared by sulphonation of pyrolyzed alkaline earth citrate product, for example as described in British patent No. 1,082,179, alkyl polyglycol ether sulfate (containing up to 10 moles of ethylene oxide); alkyl ester sulfonates such as C ₁₄ methyl ester -i6 · acyl glycerol sulfonates, fatty oleylglycerosírany, alkyl phenol, paraffin sulfonates, alkyl phosphates, isethionates such as the acyl isethionates, N-acyl taurates, alkylsukcinimáty and sulfosuccinates, monoesters of sulfosuccinate (especially saturated and unsaturated monoesters of C ₂ -C ₈₎ diesters of sulfosuccinate (especially saturated and unsaturated C6-C14 diesters), acyl sarcosinates, alkyl polysaccharide sulfates such as alkyl polyglucoside sulfates (nonionic unsulfated branched primary alkyl sulfates, carboxylates such as those of the formula:

RO (CH ₂ CH ₂ O) _to CH ₂ COO-M +;

described below), alkylpolyethoxy wherein R is C ₈ -C ₂₂ alkyl, k is an integer from 0 to 10, and M is a soluble salt-forming cation. Resin acids and hydrogenated resin acids such as rosin, hydrogenated rosin, and resin acids and hydrogenated resin acids present in or derived from tall oil are also suitable. Additional examples are provided in Surfactants and Cleaners (Vol. I and II by Schwartz, Perry and Berch). The variety of these surfactants is also generally described in U.S. Patent No. 3,929,678, issued December 30, 1975 to Laughlin et al., At Block 23, line 58 to Block 29, line 23 (incorporated herein by reference).

·· · •

Preferred anionic surfactants for use herein are alkylbenzene sulfonates, alkyl sulfates, alkyl alkoxylated sulfates, paraffin sulfonates, and mixtures thereof.

The internal disinfectant reverse phase of the present invention has a pH of from 1 to 12, preferably from 3 to 10, and more preferably from 3 to 9. The pH can be adjusted using alkalizing or acidifying agents. Examples of alkalizing agents are alkali metal hydroxides such as potassium and / or sodium hydroxide, or alkali metal oxides such as sodium and / or potassium oxide. Examples of acidifying agents are organic or inorganic acids such as citric or sulfuric acid.

Dissolving agents may be present in the internal disinfection opposite phase of the invention. These solvents will preferably provide improved cleaning of the wipes 8 of the present invention. Suitable solvents for incorporation herein include propylene glycol derivatives such as n-butoxypropanol or n-butoxypropoxypropanol, water-soluble CARBITOL® solvents ^<r) or water-soluble CELLOSOLVE® solvents ^(R). Water-soluble solvents (CARBITOL (R ⁾⁾ are compounds of the 2- (2-alkoxyethoxy) ethanol class in which the alkoxy group is derived from ethyl, propyl or butyl. A preferred water-soluble carbitol is 2- (2-butoxyethoxy) ethanol, also known as butylcarbitol. The water-soluble CELLOSOLVE ^(r) solvents are compounds of the 2-alkoxyethoxyethanol class, with 2-butoxyethoxyethanol being preferred. Other suitable solvents are benzyl alcohol, methanol, ethanol, isopropyl alcohol and diols such as 2-ethyl-1,3-hexanediol and the like.

2,2,4-trimethyl-1,3-pentanediol and mixtures thereof. Preferred solvents for use herein are n-butoxypropoxypropanol, butylcarbitol ^(R) and mixtures thereof. The most preferred solvent for use herein is butylcarbitol ^{(R &lt; 4 &gt;)} .

····

9 · 44 shock absorbers, brighteners,

The internal disinfectant reverse phase may further include other optional ingredients including radical scavengers, chelating agents, thickeners, fillers, stabilizers, bleach activators, dirt suspensions, dye transfer agents, anti-dusting agents, enzymes, dispersant, dye transfer restrictors, dyes, perfumes, (organic) dyes and the like.

Suitable radical scavengers for use herein include the well-known, substituted mono- and dihydroxybenzenes and their derivatives, alkyl and aryl carboxylates, and mixtures thereof. Preferred radical scavengers for use herein include di-tert-butylhydroxytoluene (BHT), p-hydroxytoluene, hydroquinine (HQ), di-tert-butylhydrochinin (DTBHQ), mono-tert-butylhydrochinin (MTBHQ), tert-butyl-hydroxyanysole, p-hydroxyanysol. , benzoic acid, 2,5-dihydroxybenzoic acid, 2,5-dihydroxyterephthalic acid, toluylic acid, catechol, t-butylcatechol, 4-allylcatechol, 4-acetylcatechol, 2-methoxyphenol, 2-ethoxyphenol, 2-methoxy-4 - (2-propenyl) phenol,

3,4-dihydroxybenzaldehyde, 2,3-dihydroxy-benzaldehyde, benzylamine, 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, tert-butylhydroxyanyl, p-hydroxyanylin, as well as npropylgalát. Highly preferred for use herein is di-tert-butylhydroxytoluene, which is, for example, commercially available from SHELL under the trade name IONOL CP ^(R) .

The radical scavenger or mixture thereof is typically present in the internal water phase up to a level of 5% by weight, preferably from 0.001% to 3% by weight, and more preferably from 0.001% to 1.5%.

Suitable chelating agents for use herein may be any chelating agent known to those skilled in the art, such as those selected from the group consisting of phosphonate chelating agents,

9 9 • 9 9 9 9

Or other polyfunctional aminocarboxylate chelating agents, carboxylate chelating agents, or substituted aromatic chelating agents, and mixtures thereof.

Such phosphonate chelating agents may contain etidronic acid (1-hydroxyethylidenebiphosphoric acid or HEDP), as well as alkylene phosphite-containing amnophosphite compounds, alkali metal ethane 1-hydroxydiphosphites, nitrilotrimethylene phosphites, ethylenediaminetetramethylenephosphites, and diethylenetaphosphites. The phosphite compounds may be present either in their acid form or as salts of different cations on some or all of their acid functionalities. Preferred phosphite chelating agents for use herein are diethylenetriamine pentamethylene phosphites. These phosphite chelating agents are available from Monsanto under the trade name DEQUEST ^{(R &} apos ^;) .

Polyfunctionally substituted aromatic chelating agents may also be useful herein. See. U.S. Patent No. 3,812,044, issued May 21, 1974 to Connor et al. Preferred compounds of this type in acid form are dihydroxydisulfobenzenes such as 1,2-dihydroxy-3,5-disulfobenzene.

A preferred biodegradable chelatvorným agent for use herein is ethylene diamine N, -disukcinamová ^I, or alkali metal, or alkaline earth, ammonium or substitutes its salts or mixtures thereof. Ethylenediamine N, -disukcinamové ^I, especially the (S, S) isomer have been extensively described in US patent no. 4,704,233, issued 23.

November 1987 to Hartman and Perkins. Ethylenediamine N, If disuccinamic acid is, for example, commercially available from Palmer Research Laboratories under the trade name ssEDDS ^(R) .

· · ♦♦ ♦♦ ♦♦ ♦♦; · · J · J J J J J J J J J J J J <<<J <<J J <<<< ♦

Suitable aminocarboxylate chelating agents useful herein include ethylenediaminetetraacetate, diethylenetriaminepentaacetate (DTPA), N-hydroxyethylenediamine triacetate, nitrilotriacetate, ethylenediaminetetrapropionate, triethylenetetraaminhexaacetate, ethanediglycine tetracycline acid, propylenediamine tetraacetate) , ammonium and substituted ammonium salts. Particularly suitable for use herein are diethylenetriaminepentaacetic acid (DTPA), propylenediaminetetraacetic acid (PDTA), such as is commercially available from BASF under the trade name Trilon FS (R ⁾ and methylglycine diacetic acid (MGDA).

Other carboxylate chelating agents for use herein include malonic acid, salicylic acid, glycine, aspartic acid, glutamic acid, dipicolinic acid, and derivatives or mixtures thereof.

The chelating agent or mixture thereof is typically present in the inner opposite phase at a level of from 0.001% to 5% by weight, preferably from 0.001% to 3% by weight, and more preferably from 0.001% to 1.5%.

The moisturizing wipes 8 of the present invention are suitable for disinfecting a variety of surfaces, including living surfaces (eg, human skin), as well as inanimate surfaces containing any solid surfaces.

Regardless of its composition, the inner opposite phase will preferably contain from about 67 to about 92% emulsion 12. Most preferably, the inner opposite phase will contain from about 82 to about 91% emulsion 12.

Where the inner opposite phase contains water as the main component, the inner phase may contain water-soluble or dispersible materials that do not adversely affect • 4 4 • 4 4

4 4

4444

• 444 4

4 «4444

4 · 44

4 4 4

4 4 4 4 ·

4 4 4 4

44 shows the stability of the high internal phase inverse emulsion 12. One such material, which is typically contained in the inner aqueous phase, is a water-soluble electrolyte. The dissolved electrolyte minimizes the tendency of the materials present in the lipid phase to also dissolve in the aqueous phase. Any electrolyte capable of imparting ionic strength to the aqueous phase may be used. Suitable electrolytes include water-soluble mono-, di- or trivalent inorganic salts such as water-soluble halides, e.g., alkali metal chlorides, nitrates and sulfates and alkaline earth metals. Examples of such electrolytes include sodium chloride, calcium chloride, sodium sulfate, magnesium sulfate, and sodium bicarbonate. The electrolyte will typically be present at a concentration ranging from about 1 to about 20% of the internal aqueous phase.

Other water-soluble or dispersible materials that may be present in the inner opposite phase include thickeners and viscosity modifiers. Suitable thickeners and viscosity modifiers include polyacrylic and hydrophobically modified polyacrylic resins such as Carbopol and Pemulen, starches such as corn starch, potato starch, tapioca, gums such as guar gum, gum arabic, cellulose ethers such as hydroxypropyl cellulose, hydroxyethyl cellulose and hydroxyethyl cellulose. . These thickeners and viscosity modifiers will typically be present at a concentration ranging from about 0.05 to about 0.5% of the internal phase.

Again, where water is a major component of the inner opposite phase, the water-soluble or dispersible material that may be present in the inner phase comprises polycationic polymers to provide steric (spatial) stabilization at the opposite phase-lipid phase and nonionic polymers which also stabilize emulsion 12. Suitable polycationic polymers include Reten 201, Kymene ^(R) 557 and Aero 711. Suitable nonionic

* ♦ «« «« «* * * * * * * * * * * * * * * * * * * * * * * The polymers include polyethylene glycols (PEG) such as Carbowax. These polycationic and nonionic polymers will typically be present at a concentration ranging from about 0.1 to about 1.0% of the opposite phase.

3. Emulsifier

Another key component of the high internal phase inverse emulsion 12 of the present invention is an emulsifier. In emulsion 12 of the present invention, the emulsifier is contained in an effective amount. What constitutes an effective amount depends upon many factors, including appropriate amounts of the lipid and internal reverse phase components, the type of emulsifier used, the level of impurities present in the emulsifier, and similar factors. The emulsifier typically comprises from about 1 to about 10% emulsion 12. Preferably, the emulsifier will comprise from about 3 to about 6% emulsion 12. Most preferably the emulsifier will comprise from about 4 to about 5% emulsion 12. Although a single emulsifier is used to describe this component , more than one emulsifier may be used to form emulsion 12. Indeed, as discussed below, it may be desirable, when certain materials are used, to utilize both a primary and a secondary emulsifier. Although it is not intended to limit the scope of the invention where two emulsifiers are used, the primary emulsifier comprises from about 1 to about 7%, preferably from about 2 to about 5%, and most preferably from about 2 to about 4% by weight of emulsion 12; and the secondary emulsifier comprises from about 0.5 to about 3%, preferably from about 0.75 to about 2%, and most preferably from about 0.75 to about 1.5% by weight of emulsion 12.

The emulsifier needs to be substantially lipid soluble or miscible with the lipid phase materials, especially at temperatures at which the lipid material melts. It should also have a relatively low HLB value. Emulsifiers suitable for use

4 · ····

• • • • • • • • • • • 9

In the present invention, the HLB values typically range from about 2 to about 5 and may contain mixtures of different emulsifiers. These emulsifiers will preferably have HLB values in the range of about 2.5 to about 3.5.

Preferred emulsifiers for use in the present invention include silicone polymer emulsifiers such as alkyldimethicone copolyols (e.g., Dow Corning Q2-5200 laurylmethicone copolyol). Such emulsifiers are described in detail in co-pending U.S. patent application Ser. No. 08 / 767,120, filed Jan. 14, 1997, by L. Mackay (Case 5653C), incorporated herein by reference.

Other suitable emulsifiers are described in copending U.S. patent application Ser. No. 08 / 336,456, filed November 9, 1994, by L. Mackey et al. (Case 5478); and U.S. Patent Application Serial No. 08 / 761,097, filed Dec. 5, 1996, by L. Mackey et al. (Case 5478R); both of which are incorporated herein by reference. The emulsifiers described herein contain certain sorbitan esters, preferably sorbitan esters of C ₁₆ -C ₂₂ fatty acids, saturated, unsaturated or branched. Because of the way in which they are produced, these sorbitan esters usually contain mixtures of mono-, di-, tri-, etc. esters. Representative examples of suitable sorbitan esters include sorbitan monooleate (e.g., SPAN ^(R) 80), sorbitan sesquioleate (e.g., Arlacel ^(R) 83), sorbitan monoisostearate (e.g., CRILL ^®) 6, manufactured by Croda, sorbitan stearates (e.g., SPAN ^(R> 60) ), sorbitan trioleate (eg, SPAN ^(R) 85), sorbitan tristearate (eg, SPAN ^(r) 65) and sorbitan dipalmitates (eg, SPAN ^(R) 40). Laurylmethiconcopolyol is a particularly preferred emulsifier for use in the present invention. Other suitable emulsifiers described herein include certain glyceryl monoesters, preferably saturated, unsaturated or branched C ₁₆ -C ₂₂ fatty acids such as glyceryl monostearate, glyceryl monopalmitate and glyceryl30.

··

4444 • 4 4 ·

4

4 4 4 4 4 4 4 monobehenate; certain sucrose fatty acid esters, preferably sucrose esters of saturated, unsaturated and branched C ₁₂ -C ₂ fatty acids such as sucrose trilaurate and sucrose distearate (for example, Crodesta ^(R) F10), and certain polyglycerol esters of saturated, unsaturated or branched C 1 fatty acids ₆ -C ₂₂ such as diglycerol monooleate and tetraglycerol monooleate. In addition to these primary emulsifiers, useful co-emulsifiers may be used to provide additional stability to the water-in-lipid emulsion 12. Suitable co-emulsifiers include phosphatidylcholines and phosphatidycholine containing compounds such as lecithins; fatty acid salts, long chain C ₆ -C ₂₂ such as sodium stearate, long chain C ₁₆ -C ₂₂ dialiphatic, short chain C1 -C4 dialiphatic quaternary ammonium salts such as sodium and dílojodimethylchlorid dilojodimethylmethylsíran sodium; dialkoyl (alkenoyl) -2-hydroxyethyl long chain C ₆ -C _22; dialiphatic quaternary ammonium salts of short chain C3.-C4-like dilojooyl 2hydroxyethyldimethylchlorid sodium long chain C ₆ -C ₂₂ dialiphatic imidazole, quaternary ammonium salts such as l-ethyl-2-lojoamidoethyl lojoimidazol methylsulfate and methyl-2- 1amidoethyl oleylimidazole methylsulfate; short chain C1 -C4 dialiphatic, long chain C ₆ -C ₂₂ monoaliphatic benzyl quaternary ammonium salts such as sodium dimethylstearylbenzylchlorid and synthetic phospholipids such as stearamidopropyl PG-dimonium chloride (phospholipid PTS from Mona Industries). Interfacial voltage modifiers such as cetyl and stearyl alcohol may also be included in the water-lipid interface for closer packaging.

Other emulsifiers useful in making the present invention include the high viscosity emulsifiers described in copending U.S. patent application Ser. No. 08 / 759,547, filed Dec. 5, 1996, by L.

4444

4,444 • 4 4 ·

4 4 4

4 4 4

4 4 ·

4 4 4

44

Mackey and B. Hird, incorporated herein by reference. These emulsifiers preferably have a viscosity at 55 ° C of at least about 500 centipoise. (Viscosity can be measured using a Brookfield-type rotary disk viscometer from Lab-Line Instruments.) This application describes in particular the use of emulsifiers such as those referred to by The Lubrizol Corporation (Wicklife, OH) as OS-122102, 0S121863, OS-121864, OS -80541J and QS-80691J, which are the reaction products of: (i) a hydrocarbyl substituted carboxylic acid or anhydride (preferably polyisobutylene substituted succinic acid or anhydride); and (ii) an amine or an alcohol to form an ester or amide product. Materials and methods for their manufacture are described in U.S. Patent No. 4,708,753, issued November 24, 1987 to Forsberg (see especially column 3, lines 32-38; and column 8, line 10 to column 26, line 68). ); and U.S. Patent No. 4,844,756, issued July 4, 1989 to Forsberg; both of which are incorporated herein by reference.

Other materials believed to be useful in the present invention include hydrocarbon substituted succinaldehydes such as those described in U.S. Patent No. 3,215,707, issued November 2, 1965 to Rens; U.S. Patent No. 3,231,578, issued November 25, 1996 to Rense; U.S. Patent No. 5,047,175, issued to Forsberg on September 10, 1991; and World Patent Publication No. WO 87/03613, published by Forsberg on June 18, 1987. These publications are both incorporated herein by reference.

Still other materials useful as emulsifiers, especially as a co-emulsifier with a high viscosity primary emulsifier, are ABA block copolymers of 12-hydroxystearic acid and polyethylene oxide. Such materials are described in U.S. Patent No. 4,875,927, issued to T. Tadros on April 4, 2004.

4444

4 * 4 • 445 ·

4 44 4

On October 24, 1989, incorporated herein by reference. An exemplary material of this class useful herein is an emulsifier available from Imperial Chemical Industries PLC as Arlacel P135.

Although the materials described above may be used as a single emulsifier, it may be desirable to use more than one emulsifier to form emulsion 12. Especially where a high viscosity emulsifier is used, a sticky feeling may occur when the article is treated using shear pressures that break the emulsion 12. In this case, it may be desirable to use a relatively lower viscosity co-emulsifier with the primary emulsifier to using a lower amount of the main emulsifier, thereby reducing tackiness. In one preferred embodiment of the present invention, a primary emulsifier available from Lubrizol (ie, a reaction product with a polyisobutylene substituted succinic acid and an amine) and a secondary emulsifier which is an ABA block copolymer of poly-12-hydroxystearic acid and polyethylene oxide (eg, Arlacel P135) from ICI), to provide an emulsion of 12 increased levels of water retention over time, as well as a beneficial reduction in tackiness (by reducing the level of the primary emulsifier). The skilled artisan will recognize that it is the various end uses that dictate where multiple emulsifiers and appropriate relative amounts of each are appropriate. This determination will require only routine experimentation by the skilled artisan in view of this disclosure.

4. Optional emulsion components

The high internal phase inverse emulsions 12 of the present invention may also contain other optional components typically

* 9,999

9 • 99

9 9 9 9 9 9 9 present in moisture retention solutions of this type. These optional ingredients may be present either in the continuous lipid phase or in the inner polar (opposite) phase and include perfumes, antimicrobial (e.g., antibacterial) active agents, pharmaceutical active agents, deodorants, opacifiers, contractions, skin moisturizers and the like, as well. as mixtures thereof. All of these materials are well known in the art as ingredients for such formulations and can be used in effective, appropriate amounts in the emulsions 12 of the invention. A particularly preferred optional ingredient which is included in the emulsions 12 of the wet wipes 8 of the present invention is glycerin as a skin conditioning agent.

The composition of the emulsion 12 of the articles of the invention is described and claimed herein in terms of the components and corresponding amounts of these components that are present after the formation of the emulsion 12. That is, when a stable emulsion 12 is formed and applied to a given carrier. It is to be understood that the respective description (components and amount) of emulsion 12 also includes emulsions 12 formed by combining the described components and their levels, regardless of the chemical identity of the components after emulsification and application to a given carrier.

5. Other optional emulsion components

In addition to the high internal phase inverse emulsion 12, there are other optional ingredients that may be included in the articles of the invention, typically for the purpose of increasing the cleaning performance of the article when the internal opposite phase of the emulsion 12 is released. Emulsion 12 at Significant Levels

Například ···· (for example greater than 2% of the internal phase) as they could cause premature break of emulsion 12. These include a variety of anionic detersive surfactants having relatively high HLB values (for example, HLB values from about 10 to about 25), such as sodium linear alkylbenzene sulfonates (LAS), or alkyl ethoxy sulfites (AES), as well as nonionic active cleaning surfactants such as alkyl ethoxylates, alkylaminoxides, alkyl polyglycosides, zwitterionic surfactants, ampholic cleaning surfactants, and cationic surfactants are cetyltrimethylammonium salts and lauryltrimethylammonium salts. See. U.S. Patent No. 4,597,898 to Vander Meer, issued July 1, 1986 (incorporated herein by reference), in particular Columns 12-16 for exemplary anionic, nonionic, zwitterionic, ampholic and cationic detersive surfactants. Instead, these high HLB cleaning surfactants may be applied or contained in the article separately from the emulsion 12. For example, an aqueous solution of these high HLB cleaning surfactants may be applied to the carrier either before or after the emulsion has been applied thereto. 12. During wiping, emulsion 12 is broken and releases components of the opposite phase so that they can then be combined with a high HLB cleaning surfactant to provide better cleaning of the hard surface.

Although the disclosure generally relates to the use of one water-in-oil emulsion 12 per carrier, it is recognized that two or more different emulsions 12 may be used in the preparation of a single article. In such embodiments, emulsions 12 may vary in a variety of ways, including but not limited to. to the ratio of the inner opposite phase and the outer lipid phase, the emulsifiers used, the components used for both the inner and lipid phases, and the like. The use of multiple emulsions 12 in one product may be particularly desirable when two or more components are incompatible with each other, but each may be contained in a separate (or separate) emulsion 12. Alternatively, if a particular one is desired at the time of use Reaction, the reactants may be provided in separate emulsions 12. Upon application of shear, emulsion 12, the desired reaction occurs. For example, where it is desired during the foaming wipe process, mild acid may be incorporated into the inner opposite phase of one emulsion 12, while bicarbonate is incorporated into the inner opposite phase of the other emulsion 12. By breaking the emulsions 12 during use, the reactants in question react together to provide the desired foam.

Descriptions of suitable emulsion 12 are also found in the aforementioned co-assigned World Patent Applications No. WO 96/14835, published May 23, 1996, by the name of Mackey et al .; and WO 96/21505, published Jul. 18, 1996, on behalf of DesMaraise; incorporated herein by reference.

Emulsion pattern

As noted above, the emulsion 12 is preferably applied to the backing layer (or hereinafter also the backing) 10 in some intermittent (or discontinuous) pattern. As noted above, the dotted pattern is that in which the emulsion 12 has distinct areas separated by areas 14 of the substrate 10 on which the emulsion 12 is not. Suitable intermittent patterns include separate islet regions of emulsion 12, a substantially continuous emulsion network 12, discontinuous (discrete) emulsion macro macros 12, and, preferably, discontinuous strips of emulsion 12 arranged in a semi-continuous pattern. These strips are preferably continuous as shown, but may alternatively include a pattern of discontinuous segments that together include the strip. When strips are selected, these

9

9 9 9 9 9

9 9 9 9 9

999999 9 9 9 9 99

9 9 9 9 9

9999 9 99 99 99 1 are preferably oriented in the longitudinal direction (production lines), for ease of manufacture.

The emulsion 12 may be applied and arranged on the substrate 10 by any suitable method well known in the art such as gravure printing, flexographic printing, spraying and preferably extrusion. More preferably, the emulsion 12 is extruded as a series of continuous, cylindrically shaped bodies (hereinafter, the beads). A continuous cylindrical shape is preferred for the emulsion 12 because it reduces the surface area to volume ratio of the emulsion 12.

The strips may be straight as shown, may be sinusoidal shaped and the like. If sinusoid-shaped strips are selected, these strips are preferably in a phase such that parallelism is maintained and each strip remains equally spaced from adjacent strips.

It is desirable that the emulsion 12 have a minimum possible surface area to volume ratio. Minimizing the surface area to volume ratio reduces water loss from emulsion 12 due to evaporation. The emulsion 12 preferably has a surface area to volume ratio of less than or equal to 4 / unit length, preferably less than or equal to 3 / unit length, most preferably less than or equal to 2 / unit length, in which the unit length is measured in the cross-section of emulsion 12. Suitable surface area to volume ratios for the cylindrical beads (or strips) of emulsion 12 range from 40 to 200 inches ^-1 (101.6 to 508 cm ^-1 ), and preferably 75 to 125 inches ^-1 (190.5 up to 317.5 cm ^-1 ).

However, optimum results are not achieved, for example, by applying a single unit sphere of emulsion 12 to the wearer with a wipe. Such an arrangement would probably provide adequate water, but the distribution of this water would be very localized and would not need to be extended throughout.

4 of the surface area of the wipe 8. Preferably, the distribution of the emulsion 12, or more specifically the water released therefrom, is approximately equal to the perception of a water spray on the skin.

It will be apparent to those skilled in the art that when the basis weight and absorbency of the substrate 10 increases, the amount of water necessary to saturate the substrate 10 is also increased. Thus, as the basis weight and / or absorbency of the substrate 10 increases, the amount of emulsion 12 applied to the substrate 10 should increase proportionally.

Preferably, 5 to 35 percent and preferably 10 to 25 percent of the surface area of the wiping cloth 8 has an emulsion 12 disposed thereon. Upon breakage of the emulsion 12, it locally moistens the corresponding areas of the substrate 10. The wetted portion of the substrate 10 can range from 10 to 90% The surface area of the substrate 10 is, of course, an equilibrium of the surface area of the substrate 10 remaining dry due to the given intermittent pattern.

It will be appreciated that, in use, the percentage of wetted surface area will be greater than the percentage of surface area initially covered with emulsion 12. It will be further understood that certainly the entire wetting wipe 8 may be wetted as a function of time and / or use of the composition.

Thus, the beads (or bands thereof) of the emulsion 12 are preferably applied to the substrate 10 in an arrangement that satisfies both the diameter and pitch of the beads in some preferred geometry. The amount of water carried by the emulsion 12 increases according to the square of the bead diameter. Thus, as the diameter of these beads increases, the spacing between adjacent strips of emulsion 12 should also increase. Suitable pitches between adjacent beads of the emulsion range from 0.030 to 1.500 inches (0.76 to 38.1 mm) and preferably from 0.175 to 0.375 inches (4.44 to 9.52 mm).

If the emulsion 12 is to be directly exposed to the surface, i.e. arranged on the exterior of the substrate 10 when the moisturizing wipe E is applied to the wearer, the emulsion 12 preferably comprises a level of at least 25 percent, more preferably at least 50 percent and most preferably at least 75 percent of the basis weight of the substrate 10. Alternatively, when the emulsion 12 will be disposed between two layers of the substrate 10 in a laminate assembly, for tissue paper applications, the emulsion 12 preferably comprises at least 150 percent, more preferably at least 200 percent, and most preferably at least 250 percent bonded area the weight of the two layers. In such a laminate assembly for hard surface cleaning applications, emulsion 12 preferably comprises at least 500 percent, more preferably at least 650 percent, and most preferably at least 800 percent of the combined basis weight of the two layers.

It should be noted that the basis weights described herein refer to the total basis weight of substrate 10, as the average of areas with different basis weights contained in substrate 10. The basis weight of substrate 10 can be measured according to ASTM Test Method D3776-9, which test method is incorporated herein. by reference, with results reported in pounds per 3,000 square feet (27,9 m ² ). The weight of the emulsion 12 is gravimetrically measured once the basis weight of the substrate 10 is known as a tare.

If desired, the regions 14 of the emulsion-free substrate 10 may be slightly wider in cross-section at the edges of the wipe 8 than the corresponding regions 14 disposed on the interior of the wipe 8. This arrangement suits the processing and longitudinal cutting of the wide, multi-scroll structure of the moistening wipe Q into narrower separate units for transportation and sale to the consumer. It will be appreciated by those skilled in the art that the emulsion-free regions 14 may also form an edge at the other edges of the wetting wipe 8. Such geometry can be easily achieved by not applying the emulsion 12 continuously. Instead, the emulsion 12 may be applied intermittently in the longitudinal direction (production lines). The substrate 10 is then cut or perforated in a transverse direction, coinciding with the regions 14 without emulsion 12, to provide separable wipes 8.

Referring to FIG. 2, the emulsion 12 may define patterns such as macro-patterns. The macroscopes can be used above, as shown, or placed on an intermittent band pattern of emulsion 12. Emulsion macros 12 provide the advantage that locally greater amounts of water can be used from a pattern that provides an aesthetically pleasing visual feel to the user where the emulsion is present. 12. The macroscapes of emulsion 12 may form decorative features. These decorative features may take the form of flowers, butterflies, clouds, trade names, advertisements, or any other pattern intended by the user.

In a preferred embodiment, the substrate 10 comprises tissue paper with multiple basis weights. Such a substrate 10 may be manufactured according to the aforementioned patterns, describing the same and incorporated herein by reference. A multi-basis weight substrate 10 provides the advantage that excess water will more easily saturate low basis weight regions and, therefore, will be easier to use on the surface. Preferably, the multi-basis weight substrate 10 comprises a substantially continuous basis weight network area with discrete low basis weight areas distributed throughout the substantially continuous network.

Alternatively, a substrate 10 having a semi-continuous pattern of high and low basis weight regions may be selected. In an even less preferred embodiment, a substrate 10 having a substantially continuous network of low basis weight regions may be utilized.

9 9 · ·

9 9 9

9999 98 9

9

9999 9 99 99 with its distributed discrete areas of high basis weight, but provided that we are willing to compromise on the inherent strength of the substrate 10. Such substrate 10, assumed to provide the benefit of a substantially continuous pattern of regions with a low basis weight will make it easier for the water displaced from the emulsion 12 to penetrate the substrate 10 and be transferred to the surface.

When a substrate 10 having a substantially continuous high basis weight region is selected, the pitch of the individual low basis weight regions is less than the spacing between adjacent strips of emulsion 12. This relative pitch difference ensures that the emulsion 12 will delimit the low basis weight regions and it will be easier to transmit as described above.

For embodiments described herein for handkerchief applications, a substrate having a basis weight of 7-10 pounds (3.17-4.53 kg) per 3000 square feet (279 m ² ) per layer, and 50-300, and preferably 100-200 separate areas, is suitable. with a low basis weight per square inch (6.45 cm ² ). For hard surface applications, a substrate 10 having a basis weight of 20 lb (9.07 kg) per 3000 square feet (279 m ² ) and 100 to 200 separate regions of low basis weight per square inch (6.45 cm) is suitable ² ).

In a preferred embodiment, the moisturizing wipe 8 may be manufactured according to commonly assigned US patent application entitled Cleansing Products comprising a Cellulose Based Fiber Structure having Separate Areal Weight Areas Treated with a High Internal Phase Inverse Emulsion, filed July 1, 1997, by Nicholas J Nissinga et al., The disclosure of this patent is incorporated herein by reference.

If a substrate 10 having a semi-continuous basis weight pattern is selected, such substrate 10 may be manufactured according to commonly assigned U.S. Patent No. 5,628,876, issued May 13, 1997 to Ayers et al., And incorporated herein by reference. The semi-continuous pattern is preferably oriented in the longitudinal direction (production lines). If such geometry is selected, it is contemplated that the beads (or strips) of emulsion 12 may be applied to the semi-continuous patterned substrate 10 such that the emulsion 12 is positioned adjacent and preferably coinciding with regions of low basis weight of substrate 10. This arrangement provides the above discussed advantage. in that the water displaced from the emulsion 12 is more easily transported through the low basis weight regions of the semi-continuous patterned substrate 10. The low basis weight regions of the semi-continuous pattern, when parallel to the longitudinal direction, may be arranged at a pitch less than or equal to the strips of emulsion 12. .

It will be apparent to one skilled in the art that many variations are feasible within the scope of this claimed invention. For example, a laminate assembly may be performed, comprising an emulsion 12 disposed between two layers of the substrate as described above. However, it is not necessary that these layers be identical. One layer may be a nonwoven material for strength. The second layer may be a tissue to provide water transfer to the surface. If desired, the nonwoven layer may be treated to become hydrophobic to ensure that the water released from the emulsion 12 is transferred to the surface by a tissue paper layer.

Alternatively, a laminate of two layers of tissue paper may be selected. One of these layers may have a pattern of a multi-weight area as described above. An area with multiple basis weights may include some semi-continuous pattern. The second layer may comprise a single basis weight region for strength. This embodiment provides greater transmission

44 4 • · 4 · «4

4 ·

4444

4 4 4 4 4 •

4 4 4 4 4 5

4 · 4 4 4 44 water in one of these layers than the other. Alternatively, the multi-basis weight region layer may comprise a substantially continuous network of high basis weight regions with separate low basis weight regions distributed therein.

In yet another embodiment, a laminate having a plurality of layers may be provided. These layers may include alternating layers of substrate 10 and emulsion 12. This laminate may have two outwardly facing layers of substrate 10 as described above. The emulsion 12 may be completely contained within the laminate or, alternatively, the emulsion 12 may be disposed on one exposed surface of the laminate.

Referring to FIG. 3, in yet another embodiment, the strips of emulsion 12 may be comprised of separate spheres of the emulsion 12. These separate spherical surfaces of the emulsion are placed side by side so as to form a generally intermittent pattern. This arrangement provides the advantage of a suitable ratio of surface area to emulsion volume, similar to the generally cylindrically shaped beads described above. Although in FIG. 3, the person skilled in the art will appreciate that the discontinuous spherical surfaces 12 can be juxtaposed to form any desired discontinuous pattern.

Yet another variation shown in FIG. 3, but applicable to any of the foregoing embodiments, is varying the amount of emulsion 12 within said discontinuous pattern. For example, certain strips of emulsion 12 may have relatively more emulsion 12 than other strips. This arrangement allows locally greater amounts of water to be discharged onto the surface to be cleaned, but still provides relatively drier edges to minimize the amount of residual water remaining on the surface.

It will be appreciated that, depending on the desired use, the moisturizing wipes 8 may be provided separately

9

9 9

9

9999

9 9 «

9 9 4

9 9

9 ·

9 ·

9 'units, may be joined by perforations as a whole and the like. The moisturizing wipes may be dispensed individually, as is normally the case with cosmetic wipes. If dispensing is desirable one at a time, these humectant wipes may be provided in a dispensing device from which they are either pulled out or out of, as described in commonly assigned US patents: 4,623,074, granted

November 8, 1986 for Dearwester; No. 5,520,308, issued May 28, 1996 to Berg Jr. et al .; and No. 5,516,001, issued May 14, 1996 to Muckenfuhse et al .; whose descriptions are incorporated herein by reference. Alternatively, the wipes may be rotated on the core as described in commonly assigned U.S. Patent No. 5,318,235, issued June 7, 1994 to Sato, the disclosure of which is also incorporated herein by reference. If desired, the moisturizing wipes may be lightly compressed for packaging, provided care is taken not to break the emulsion 12. Such packaging may be accomplished as described in commonly assigned US Patent No. 5,664. 897, issued July 8, 1997 to Young et al., The disclosure of which is incorporated herein by reference.

Claims (10)

PATENT CLAIMS A moisturizing wipe comprising a substrate and a high internal phase inverse emulsion disposed thereon, the emulsion being arranged in a discontinuous pattern, whereby the substrate has a first region covered with an emulsion and a second region without it, the emulsion preferably being arranged in a pattern comprising strips, the strips are more preferably generally parallel. A moisturizing wipe according to claim 1, characterized in that the emulsion comprises strips preferably having a generally cylindrical shape. A moisturizing wipe according to claim 1 or 2, wherein the substrate comprises a first plurality of regions having a first basis weight and a second plurality of regions having a second basis weight, the first basis weight being greater than the second basis weight, and the substrate preferably comprising a substantially continuous the high basis weight web in which the separate low basis weight regions are divided, and the emulsion is more preferably arranged on the substrate in a pattern comprising strips, said stripes defining a first pitch, the low basis weight substrate regions defining a second pitch less than the spacing of the aforementioned strips, whereby the emulsion strips are at least some areas of low basis weight coincidence (same). A moisturizing wipe according to claim 1 or 2, wherein the substrate comprises a semi-continuous pattern 4 * ·· # · 4 4 • 4 4 4 4 * 4 4 ··· 4 4 4444 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 The high basis weight regions separated by the low basis weight regions and the emulsion preferably comprise strips, these strips being placed side by side with the low basis weight substrate regions. 5. A moisturizing wipe comprising a substrate having two exposed surfaces, a first exposed surface and an opposed second exposed surface, the wipe further comprising a high internal phase inverse emulsion disposed on one of the exposed surfaces, the substrate having a first basis weight and a coating emulsion has a weight of at least 50 percent of the basis weight, the emulsion has a ratio of surface area to volume is less than 200 inches ^"1 (508 cm" ¹⁾ and the coating weight is preferably at least 75 percent of said basis weight. A moisturizing wipe comprising a substrate having a high internal phase inverse emulsion disposed thereon, the emulsion being arranged in a discontinuous pattern by which, in use, the substrate has a first region that is moistened by releasing fluid from the emulsion, and second areas that are dry in use, and the wetted areas and dry areas preferably comprise a semi-continuous pattern of alternating strips, and said fluid preferably comprises water. A moisturizing wipe comprising a laminate having a plurality of layers, the layers comprising two outer layers and a central layer disposed therebetween, each of the outer layers comprising a backing layer, the central layer being arranged on at least one of these outer layers, the central layer layer includes inverse emulsion ♦ · 9 · 9 9 9,999 99 9 9 9999 9 99 · ο · 99 99 9 9 9 9 9 9 9 9 9 9 9 9 • 99 99 with high internal phase, the outer layers have a combined basis weight, the emulsion has a coating weight of at least 150 percent of the combined basis weight of the outer layers, the emulsion has a surface area to volume ratio of less than 200 inches ^-1 ( 508 cm ^-1 ) and the weight of the emulsion coating is preferably at least 200 percent of the combined basis weight of the outer layers, and the substrate more preferably comprises air-dried web. A moisturizing wipe according to claim 3, 4 and 7, wherein the low basis weight regions comprise openings. 9. A method of manufacturing a moisturizing wipe comprising the steps of: providing the substrate, providing the inverse emulsion with a high internal phase, arranging the emulsion on the substrate in a pattern in which the first plurality of substrate regions are covered with the emulsion and the second plurality of substrate regions is emulsion free, and preferably wherein the step of arranging the emulsion on the substrate comprises: moving one of the substrate and the emulsion relative to the other in the longitudinal direction (production lines), and extruding said emulsion onto the substrate in a plurality of strips that are generally parallel in the longitudinal direction and the emulsion more preferably has a surface area to volume ratio greater than 50 inches ^-1 (127 cm ^-1 ), and most preferably the emulsion covers from 10 to 25 percent of the surface area of the substrate. A moisturizing wipe according to claim 1, 2, 3, 4, 5, 6, 7, 8 and 9, wherein said substrate is cellulose based.